In the spring of the year 1006, Earth's sky was drastically altered by the appearance of a supernova that was brighter than the entire combined night sky. Mentioned in historical records throughout Europe, Asia, Africa, and North America, this supernova was likely bright enough to be visible during daylight hours,… »4/28/13 2:00pm 4/28/13 2:00pm

The red supergiant star Betelgeuse is getting ready to go supernova, and when it does Earth will have a front-row seat. The explosion will be so bright that Earth will briefly seem to have two suns in the sky. »1/20/11 10:22am 1/20/11 10:22am